Some of the world’s largest creatures are on the verge of extinction. A recent study looked at 74 of the world’s largest herbivores. It found that 60 percent of the biggest plant-eating mammals on earth could be wiped out very soon. The study was by the American Association for the Advancement of Science (AAAS). It focused on elephants, hippopotamuses, gorillas, wild pigs, tapirs, rhinoceroses, zebras and other wild horses, deer, and bovine animals such as goats and cattle. Most of the animals live in Africa and Southeast Asia. Scientists found that humans are the main reason that these animals are in danger. Humans kill the animals for their meat and body parts (furs and skins). Animals are also dying because of deforestation, livestock breeding, and a loss of their habitats.